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Ammonia sensor gas detection
Ammonia (NH3) is one of the most commonly produced industrial chemicals. Being part of the nitrogen cycle it is produced in soil from bacterial processes. It is naturally produced from the decomposition of organic matter like plants and animal waste.
Ammonia is a colourless, highly irritating gas with a pungent, suffocating odour at room temperature. Also known as anhydrous ammonia in its pure form, it readily absorbs moisture. It is corrosive because it has alkaline properties. Ammonium hydroxide is formed when Ammonia gas is dissolved in water. It forms a clear liquid when Ammonia gas is under pressure. Ammonia is shipped in steel containers as compressed liquid ammonia, exposed to high heat, is explosive.
The prime use for ammonia is in agricultural fertilizer. Other uses are, in purification of water supplies, in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals. It is found in many household and industrial-strength cleaning solutions.
Ammonia is also used as a refrigerant gas.
Exposure to high concentrations of ammonia in air causes an immediate burning of the nose, throat and respiratory tract. This can cause bronchiolar and alveolar oedema, and airway destruction resulting in respiratory distress or failure. It is therefore important to have an Ammonia sensor gas detection system in place as part of a safety plan in facilities that use Ammonia gas in their refrigerators or cooling rooms.
Where Ammonia sensor gas detection equipment and gas sensors are used, which can detect gas leaks, it should interface with the control system to automatically shut down in order to prevent a hazardous situation. An Ammonia sensor gas detection alarm can alert operators in the area where the leak has occurred allowing them the opportunity to vacate the area.
Gas leak detectors are not only used for Ammonia sensor gas detection but can also be used to detect combustible, flammable and other toxic gases as well as oxygen depletion.
Gas detectors are usually battery operated. Warning signals, audible and visible, such as alarms and flashing lights, warns when dangerous levels of gas vapours are detected. As detectors measure a gas concentration, the sensor responds to a calibration gas, which serves as the reference point or scale. As a sensor’s detection exceeds a pre-set alarm limit, the alarm or signal will be activated.
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